| ID | Name | Type |
|---|---|---|
| #10631 | Oscar Mira Vazquez | + |
| #19349 | Oscar Miralles | + |
| #10632 | Oscar Ortega | + |
| #10633 | Oscar Soft | Z |
| #10634 | Oscar Systems | Z |
| #10635 | Oscar Vives Martinez | + |
| #19814 | Oscarbraindead | - |
| #10636 | Oskar Merker | + |
| #22350 | Oskitone | Z |
| #10637 | Osvaldo Pinali Doederlein | + |
| #10638 | Oszkar Balazs | + |
| #19214 | OtaSoft | P |
| #10639 | Otava | ? |
| #22043 | Ottersoft | P |
| #20450 | Ottfried Schmidt | + |
| #10640 | Otto Adametz | + |
| #21175 | Otto Frederico Pereira de Carvalho Filho | + |
| #10641 | Otto Hausbacher | + |
| #10642 | Otto Stolz | + |
| #22756 | Otto Warnecke | + |